Microstructure and texture optimization by static recrystallization originating from {10-12} extension twins in a Mg-Gd-Y alloy

doi:10.1016/j.jmst.2020.04.040

IMR OpenIR

	Microstructure and texture optimization by static recrystallization originating from {10-12} extension twins in a Mg-Gd-Y alloy
	Lu, S. H.1,2; Wu, D.1; Chen, R. S.1; Han, En-hou 1
通讯作者	Wu, D.(dwu@imr.ac.cn) ; Chen, R. S.(rschen@imr.ac.cn)
	2020-12-15
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	59 页码:44-60
摘要	During the deformation of Mg alloys, {10-12} extension twin often contributes to the formation of basal texture but rarely assists the nucleation of recrystallization, i.e., effective grain refinement, therefore it seems to make against the improvement of formability and mechanical properties. In this work, {10-12} extension twin has been creatively utilized as a preference nucleation site for static recrystallization (SRX), achieving grain refinement and orientation randomization in a Mg-Gd-Y alloy using multi-directional impact forging (MDIF) and subsequent annealing treatment. Effect of {10-12} extension twin on SRX behavior has been investigated by annealing treatment at 450 degrees C using quasi-in-situ optical microscopy (OM) and quasi-in-situ electron back-scattering diffraction (EBSD). The microstructural evolution during annealing shows that several SRX gains can nucleate from the grain boundary of untwinned grains, but they only have few influences on the final microstructure due to their limited volume faction and sluggish growth. In contrast, a large number of SRX gains can initiate from {10-12} extension twin and grow up without the confine of twin boundaries. Finally, they consume their parent grains and make the main contribution to grain refinement. This should be attributed to those pinned {10-12} twin boundary, by interacting with various dislocation slips during the MDIF process, which can operate like grain boundary, store enough strain energy, and promote the nucleation of SRX during annealing. On the other hand, SRX grains usually keep initial random orientation and further randomize the forging texture during annealing treatment. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	Mg-Gd-Y alloy Multi-directional impact forging (MDIF) {10-12} extension twin Quasi-in-situ electron back-scattering diffraction (EBSD) Static recrystallization (SRX)
资助者	National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Science and Technology Major Project of China ; Natural Science Foundation of Liaoning province
DOI	10.1016/j.jmst.2020.04.040
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2016YFB0301104] ; National Natural Science Foundation of China[51531002] ; National Natural Science Foundation of China[51301173] ; National Natural Science Foundation of China[51601193] ; National Natural Science Foundation of China[51701218] ; National Science and Technology Major Project of China[2017ZX04014001] ; Natural Science Foundation of Liaoning province[20180550799]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000588638600005
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：32[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/141263
专题	中国科学院金属研究所
通讯作者	Wu, D.; Chen, R. S.
作者单位	1.Chinese Acad Sci, Inst Met Res, Grp Magnesium Alloys & Their Applicat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Lu, S. H.,Wu, D.,Chen, R. S.,et al. Microstructure and texture optimization by static recrystallization originating from {10-12} extension twins in a Mg-Gd-Y alloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,59:44-60.
APA	Lu, S. H.,Wu, D.,Chen, R. S.,&Han, En-hou.(2020).Microstructure and texture optimization by static recrystallization originating from {10-12} extension twins in a Mg-Gd-Y alloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,59,44-60.
MLA	Lu, S. H.,et al."Microstructure and texture optimization by static recrystallization originating from {10-12} extension twins in a Mg-Gd-Y alloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 59(2020):44-60.